Method of manufacturing electrostatic condensers



Sept. 8, 1953 n. R. cLEMoNs METHOD oF MANUFACTURING ELEcTRosTATIc vcoNDsNsERs Filed oct. 25, 1944 2 Sheets-Sheet 1 w n Mw M ;:22: Wuw I Tl v6 A W M4 w Sept. 8, 1953 D. R. CLE-MONS u 2,651,101

METHOD oF MANUFACTURING ELEcTRosTATIc coNDENsERs Filed oct. 25, 1944 2 sheets-sheet 2 UHUHUUHU lever 32 in'its vertical position. To lower the head I4, the hand lever 32 is rocked counterclockwise (Fig. 2), whereupon the cam face 33 of the cam member 3l riding upon the upper face of the screw 34 depresses the slide I'I against the action of the spring 25 and carrying therewith the yieldably connected head i4. In operation the cam arrangement and the springs 25 are such that the heads I4 are forced into contact with a condenser unit under a pressure of substantially one hundred pounds per square inch of condenser area.

Formed in the block I2 are two horizontally eX- tending apertures 38, in each of which are sealed suitable electrical heating units 3'9 connectedrto a suitable source of electrical energy by conductors 40. The block I2 is maintained at a temperature of 400 F. and since the slidable head I4 is in intimate Contact with the opposite vertical Walls of the cavity IS in the block I2, it is also heated to substantially 400Q F.

Rolled condenser units, indicated in broken I outline at 1I-4I, shown within the left hand cavities I3--I3 of Fig. l, and also as shown in Fig. 2, may be placed therein by means of a suitable hand tool, and, upon completion of the compressing and baking thereof, are ejected from Ythe lcavities I3 by means of an ejector comprising a rod 42 slidably carried in the frame I0 above the block I2 and arranged to engage the inner end of the compressed and baked condenser unit 4I and slide the same out of the cavity and onto a receiving platform (not shown) In order to actuate the ejector rod 42, it is connected at its rear end, which extends from the vertical frame Wall II, to a parallel actuator rod 45, also slidable in the frame I0, by a cross mem#- ber 46. The ejector rod 42 and its actuator rod 45 are normally maintained in their inoperative position, as shown in the drawings, by means of a coiled compression spring 47 surrounding the rod 45 with its opposite ends abutting the member 46 and the vertical frame wall I I. A handle 48 on the forward end ofthe rod 45 (Figs. 1 and 3) arranged to engage the front vertical wall of the block I2 serves as a stop for the connected rods 42 and 45 under the urging of the spring 4'I.

In practicing the method of producing the condensers 4I in accordance with this invention, measured lengths of foil and paper are interwound in a well-known usual manner and manually flattened slightly. The rolled condensers are preferably immediately conveyed directly to the apparatus herein described, where each condenser is uniformly individually compressed and simultaneously heated under a pressure on the order of one hundred pounds per square inch and a temperature on the order of 400 F. and for a period on the order of two and one-half minutes to compress and bake or dehydrate the wound unit. 'Iliereaftenl the condenser units are predeterminedly assembled together to provide the desired capacity and retained by suitable clamps with the required insulation therebetween and then vacuum dried and impregnated. After making final pressure adjustments of capacity, the assemblage of condenser units is sealed in a container with a potting compound.

What is claimed is:

1. The method of making condensers, which comprises applying to a plurality of rolled condensers sufficient pressure to flatten the condensers and stabilize the shapes and capacities thereof, heating the condensers while they are under pressure sufliciently to remove most of the moisture included therein, releasing the pressure on the condensers, assembling under pressure the condensers while they are still hot in combinations of a predetermined capacity, simultaneously heating the stacked condensers and applying vacuum thereto to remove the remainder of the moisture therein, impregnating the stacked condensers, and potting the stacked condensers.

2.Y The method of making condensers, which comprises applying individually to a plurality of rolled condensers suflicient pressure to flatten the condensers and stabilize the shapes and capacities thereof, heating the condensers while they are under pressure suiciently to remove most of the moisture included therein, releasing the pressure on the condensers, assembling under pressure the condensers while they are still hot in combinations of a predetermined capacity, simultaneously heating the stacked condensers and applying vacuum thereto to remove the remainder of the moisture therein, impregnating the stacked condensers, and potting the stacked condensers.

3. The method of making condensers, which comprises applying individually to a plurality of rolled condensers sulicient pressure to ilatten them into stable shapes, heating the condensers sufliciently to remove most of the moisture in the condensers while the condensers are subjected to said pressure, releasing said pressure, assembling under pressure the condensers while they are still hot in combinations of a predetermined capacity, heating the stacked condensers in vacuum, impregnating the stacked condensers in Vacuum, and potting the stacked and impregnated condensers.

f to remove most of the moisture in the condensers DALE R. CLEMONS.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,058,397 Wood Apr. 8, 1913 1,594,124 Schrader July 27, 1926 1,674,641 Halliwell June 26, 1928 1,721,503 Priess July 23, 1929 1,849,885 Priess Mar. 15, 1932 2,181,695

Given Nov. 28, 1939 

